World Handshake Day
World Handshake Day is held on June 21. This event in the third decade of the month June is annual. 
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The handshake may have originated in prehistory as a demonstration of peaceful intent, since it shows that the hand holds no weapon. Another possibility is that it originated as a symbolic gesture of mutual commitment to an oath or promise: two hands clasping each other represents the sealing of a bond.
Historians believe that the modern handshake is at least 3,000 years old, based on a relief from the ninth century BCE, which depicts King Marduk-Zakir-Shumi I of Babylonia shaking hands to forge an alliance with the Assyrian King Shalmaneser III.
World Handshake day is on June 21 and is a day designated to celebrate the tradition of handshakes and their many benefits. Handshakes are a sign of trust, respect, and friendship and have been used for centuries as a way to greet someone or seal a deal.
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